Doing MS in India

Hi what is the eligibility to do MS in India. Since i did B.Sc in Physics and MCA (3year) too. Now i want to study MS in Nano Science. But Indian universities are asking B.Tech or BE or M.Sc to join in MS nano Science. Pls Clarify this.

I don't know anything about the Indian system but you're maybe asking the wrong people - ask the university you're interested in if your qualifications meet their minimum criteria. Give them a call, I'm sure the admissions officer can give you an immediate answer.